[Openstack-stable-maint] Stable check of openstack/oslo.middleware for ref refs/heads/stable/train failed

Build failed. https://zuul.opendev.org/t/openstack/buildset/8a7bb458e856462dbf3da6ab05d758... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/f861991bf0784a5490391d2a4dab5aae : SUCCESS in 3m 03s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/86c3861bf0d7488d99df733f0c3a1e7f : FAILURE in 3m 05s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/2e37bcc5d9c04e8e8885886ac54b3572 : SUCCESS in 2m 47s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/586f26f5ee9046a5ab40913e21ad2de7 : FAILURE in 2m 57s